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No such problem is mentioned, that I can find, so you may have a rare malfunction of the Pioneer AVH system, perhaps.
But trying an update of the Pioneer device, appropriate to and exactly matched to the model #, would be one thing to try - if there is such an update issued by Pioneer themselves (-no other update should be applied, it could ruin the function of the device altogether.)
And it might just possibly be something else: if the song info does not change when you are playing to the unit from an Apple (or Android?) device, then you may need to enable iTunes tagging as an option.
Or perhaps something else? but tell me a little more about the problem, and it may suggest something else also.